Convert a PDF to grayscale
Re-renders every page in shades of gray — perfect before sending a document to a black & white printer or copy shop, or just to shrink colorful scans.
How to use the Grayscale PDF tool
Select or drag your color PDF.
Choose the output quality.
Click “Convert to grayscale” and download the result.
Your files stay on your device
This tool runs entirely in your browser using JavaScript and WebAssembly. There is no upload step and no server processing — open your network panel and check: zero document data is transmitted. It even keeps working offline once the page has loaded.
Frequently asked questions
Does grayscale conversion keep selectable text?
No — pages are re-rendered as grayscale images to guarantee every element (photos, charts, logos) converts correctly. For print use this makes no difference.
Will the file get smaller?
Usually yes, often dramatically for colorful documents, since grayscale images compress much better than color ones.
Why convert before printing instead of letting the printer do it?
Printer drivers convert colors inconsistently — light colors can vanish. Converting first lets you preview exactly what will print and often saves toner.
Is it safe to use this tool with confidential documents?
Yes — and verifiably so. PDFAgent has no upload step: your file is processed by JavaScript running in your own browser and never leaves your device. You can open your browser’s network panel (or even go offline after loading the page) and confirm that no document data is transmitted.
Related guides
- How to Print 2 or 4 PDF Pages Per Sheet (Save Paper & Ink) Fit 2 or 4 PDF pages onto each printed sheet to save paper and ink. Here's how to bake it into the PDF so it prints right anywhere — free, in your browser.
- How to Reduce PDF Size for Email (Under 25 MB, Free) Your PDF is too big to email? Here's how to shrink it below Gmail's and Outlook's 25 MB limit in seconds — free, private, and without losing readable quality.
- How to Compress a PDF Without Losing Quality Why PDFs get huge, the difference between lossless and lossy compression, and how to shrink a PDF for email while keeping it sharp — all in your browser.